port-i386/43268: NetBSD 5.0.2 reboots automatically on a 'umount /mnt'

[natarajsn%gmail.com@localhost]

>Number:         43268
>Category:       port-i386
>Synopsis:       NetBSD 5.0.2 reboots automatically on  a  'umount /mnt'
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-i386-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu May 06 11:20:00 +0000 2010
>Originator:     Nataraj S Narayan
>Release:        5.0.2
>Organization:
Vaaraahi Embedded
>Environment:
NetBSD  5.0.2 NetBSD 5.0.2 (GENERIC) #0: Sat Feb  6 17:53:27 UTC 2010  
builds%b7.netbsd.org@localhost:/home/builds/ab/netbsd-5-0-2-RELEASE/i386/201002061851Z-obj/home/builds/ab/netbsd-5-0-2-RELEASE/src/sys/arch/i386/compile/GENERIC
 i386

>Description:
I login as root

switch to bash shell

i mount a smbfs file system on to /mnt using command "mount -t smbfs 
//192.168.0.20/myshare /mnt

i get a password prompt, on which i enter password

system returns to # prompt

try a cd /mnt , get a 'permission denied'

try a "umount /mnt"

System immediately reboots without warning or wait.


 try to cd /mnt - gave permission denied
<nataraj> when umount /mnt, the system reboots 
<nataraj> shocking! never has it happened on Linux or Freebsd
>How-To-Repeat:

>Fix: